Search results for " ToM"
showing 10 items of 1742 documents
Influence of Drilling Technique on the Radiographic, Thermographic, and Geomorphometric Effects of Dental Implant Drills and Osteotomy Site Preparati…
2020
The aim of this comparative study is to analyze the influence of drilling technique on the radiographic, thermographic, and geomorphometric effects of dental implant drills and osteotomy site preparations. One hundred and twenty osteotomy site preparations were performed on sixty epoxy resin samples using three unused dental implant drill systems and four drilling techniques performed with a random distribution into the following study groups: Group A: drilling technique performed at 800 rpm with irrigation (n = 30)
Uso de la tomografía computarizada en el diagnóstico de la anquilosis de la articulación temporomandibular: Presentación de dos casos clínicos
2006
La anquilosis de la articulación temporomandibular es definida como la abolición o limitación de los movimientos de dicha articulación. Radiográficamente la anquilosis demuestra aspectos bien característicos que facilitan el diagnóstico, sin embargo, su análisis en las técnicas radiográficas convencionales, en la mayoría de las veces, no se presenta de forma clara. Con la evolución de las técnicas radiográficas, la tomografía computarizada pasó a ser un examen de gran importancia en el diagnóstico de las anquilosis temporomandibulares. En vista de ello, el presente trabajo se propone mostrar y describir imágenes tomográficas de la anquilosis de esta articulación, presentando dos casos clíni…
Bestimmung der Knochenqualität vor Wirbelsäuleninstrumentation - Stellenwert verschiedener in vivo-Methoden
2008
OBJECTIVE: The present investigation should elucidate which assessment technique for bone quality is most appropriate to estimate preoperatively fixation strength of instrumental spine fusions. METHODS: VDS-screw fixation strength in 50 human cadaveric vertebral bodies was approximated by means of pullout force assessment. Bone quality was assessed by Dual Energy X-ray Absorptiometry (DEXA), Quantitative Computed Tomography (QCT), MRT and histomorphometry. For each of these techniques, correlation with axial pull out force strength was investigated. RESULTS: Highest correlation was found for cancellous bone density (QCT) (r = 0.72; p < 0.001) and DEXA (r = 0.70; p < 0.001). MRT, cortical bo…
Coronary Stent Strut Fractures: Classification, Prevalence and Clinical Associations
2021
Introduction. The frequency, characteristics and clinical implications of Strut fractures (SFs) remain incompletely understood. Methods and results. A total of 185 (160 patients) newer-generation drug-eluting stents (DES) were imaged. SFs were found in 21 DES (11.4%) and were classified in four patterns: one single stacked strut (41%)
Radzenes un epitēlija biezuma mērījumu atkārtojamība ar optiskās koherences tomogrāfiju
2021
Darbs ir uzrakstīts latviešu valodā uz 31 lapaspuses. Tas satur 14 attēlus, 10 tabulas un 44 atsauces uz literatūras avotiem. Darba mērķis: novērtēt mērījumu atkārtojamību HOCT-1 ierīcei un izstrādāt ieteikumus turpmākajiem radzenes pētījumiem, izmantojot šo ierīci. Metode: Divu ražotāju SD-OCT ierīcēm – Maestro 3D un HOCT-1 - tika analizētas radzenes (RB) un epitēlija (REB) biezuma kartes centrā un 8 paracentrālos sektoros. Mērījumu atkārtojamība tika noteikta aprēķinot starp mērījumu standarta novirzi, variācijas koeficientu un starpklašu korelācijas koeficientu. Rezultāti: HOCT-1 ierīce nodrošina labu atkārtojamību RB mērījumiem centrā un vidēji labu paracentrālos sektoros. REB mērījumie…
Transcranial Magnetic Stimulation and Neuroimaging Coregistration
2013
The development of neuroimaging techniques is one of the most impressive advancements in neuroscience. The main reason for the widespread use of these instruments lies in their capacity to provide an accurate description of neural activity during a cognitive process or during rest. This important advancement is related to the possibility to selectively detect changes of neuronal activity in space and time by means of different biological markers. Specifically, functional magnetic resonance imaging (fMRI), positron emission tomography (PET), single-photon emission computed tomography (SPECT), and nearinfrared spectroscopy (NIRS) use metabolic markers of ongoing neuronal activity to provide a…
A new species of Rhopalosiphum (Hemiptera, Aphididae) on Chusquea tomentosa (Poaceae, Bambusoideae) from Costa Rica
2012
copyright 2012, Los autores y Zookeys. Datos incluidos por Lisela Moreira Carmona, responsable de depósitos del área de Patógenos y Plagas de Plantas (CIBCM-UCR). The new species Rhopalosiphum chusqueae Pérez Hidalgo & Villalobos Muller, is described from apterous viviparous females caught on Chusquea tomentosa in Cerro de la Muerte (Costa Rica). The identity of the species is supported both by the morphological features and by a molecular phylogenetic analysis based on a fragment of the mitochondrial DNA containing the 5’ region of the cytochrome c oxidase 1 (COI) and on the nuclear gene coding for the Elongation factor-1 alpha (EF1α). The taxonomic position of the new species is discussed…
Strutture e nuclei inventivi di "X", novella d'esordio di Giovanni Verga
2006
Tracer migration in crystalline rock : application to geological barriers of nuclear waste storage
2016
This work deals with transport of radionuclides in the geosphere. The subject is investigated through characterisation of water conducting fractures, determining of rock transport properties and development of new methods for characterising geological samples. Here, as is often the case, radionuclide transport is investigated indirectly by characterising the structures, where the transport takes place, and directly by measuring transport properties in the gas phase. First water conducting fractures of three different types and the rock matrix surrounding them were analysed through rock samples from Olkiluoto. The analysis was done using X-ray tomography, the 14C-PMMA autoradiography techniq…
Šaka-Hartmana aberometrijas izmantošana tīklenes biezuma mērīšanai in vivo
2018
Darbs uzrakstīts latviešu valodā uz 30 lappusēm, satur 26 attēlus, 3 pielikumu, 24 atsauces uz literatūras avotiem. Darba mērķis: izpētīt Šaka- Hartmana aberometrijas pielietojumu tīklenes biezuma mērījumiem. Pētījuma dalībnieki: 10 cilvēki. Vidējais vecums 24,3 +/- 4,37 gadi (diapazons, 20- 35 gadi). Nevienam no pētījuma dalībniekiem nav konstatētas acu slimības vai sistēmiskas saslimšanas, kam ir ietekme uz refrakciju. Metode: ar Šaka- Hartmana aberometriju tika mērīts tīklenes biezums. Daļa rezultātu tika salīdzināti ar okulokoherento tomogrāfiju. Tika noskaidrots arī tīklenes fantoma biezums. Secinājumi: Šaka- Hartmana un OCT iegūto tīklenes biezumu vidējo rezultātu starpība ir 161 µm +…